Institutional security system

ABSTRACT

Security system for use with a plurality of swinging doors having individual key-released locks, comprising a plurality of deadbolts with a single electrically operable power means for each door controllable by control switch means located at a remote control point, safety switch means controlled by each door to prevent operation of the associated power means unless that door is closed and operable, after actuation of the control switch means, to cause automatic locking actuation of the associated plurality of deadbolts when the door is closed, and signal means for indicating at the control point closed and open positions of each door and active or inactive positions of the deadbolts.

[ Jan. 15', 1974 1 INSTITUTIONAL SECURITY SYSTEM [75] Inventor: Francis T. Wolz, Joliet, 111.

[73] Assignee: Folger Adam Co., Division of Telkee,

Inc., .loliet, I11.

[22] Filed: June 16, 1972 [21] Appl. No.: 263,681

[56] References Cited UNITED STATES PATENTS 4/1966 Price 180/82 9/1962 Bacon 70/264 1,635,028 7/1927 Burr et al..... 70/280 2,765,648 10/1956 Hatcher 70/264 FOREIGN PATENTS OR APPLICATIONS 764,492 12/1956 Great Britain 70/264 DOOR 966,124 10/1950 France 292/144 Primary ExaminerAlbert G. Craig, Jr. A ttorney Lawrence W. Brugman [57] ABSTRACT Security system for use with a plurality of swinging doors having individual key'released locks, comprising a plurality of deadbolts with a single electrically operable power means for each door controllable by control switch means located at a remote control point, safety switch means controlled by each door to prevent operation of the associated power means unless that door is closed and operable, after actuationof the control switch means, to cause automatic locking actuation of the associated plurality of deadbolts when the door is closed, and signal means for indicating at the control point closed and open positions of each door and active or inactive positions of the deadbolts.

10 Claims, 10 Drawing Figures 5ELECTED Q m UNLOCK 51 A DOOR UNLOCKED B RED LIGHT DOOR UNLOCKED UUOR OPEN C RED LIGHT D00 R SE LE C TED 7U L0K D DOOR CLOSED DOOR LOCKE GREEN LIST sum 1 or 5 PATENTEB JAN 1 SW4 PATENTED JAN 1 5 I974 sumsars INSTITUTIONAL SECURITY SYSTEM BACKGROUND OF THE INVENTION 1. Field of the Invention:

This invention relates generally to security facilities, and more particularly to an improved system for use with a plurality of swinging doors, each of which may have a key-released lock, wherein a plurality of deadbolts are provided for each door for operation electrically as determined at a remote control point.

2. Description of the Prior Art:

Actuation of a deadbolt for each of a plurality of swinging doors under control from a point remote from the doors is known in the prior art. And use of such an arrangement in an institutional system in which each door also is provided with a keyreleased lock operable by the individual room occupant also is known. But such systems provide only single point holding or locking of each door by its associated deadbolt, and the key-released lock, if employed, does not enhance the security as against the room occupant.

It also is known to prevent locking movements of such deadbolts unless the doors are closed, in a system of swinging doors employing only mechanical means for actuating the deadbolts, and to provide signal means at the control point to indicate the open or closed position of each door. However, such a system has the disadvantage of making it possible to prevent locking of all of the doors if any one door is not closed.

SUMMARY OF THE INVENTION This invention provides maximum security by employing for each swinging door a plurality of deadbolts under the control of, or operable by, a single electrically operable power means, such as a motor or solenoid means, controllable by switch means located at a remote control point. It further provides door position safety switch means controlled by each door to prevent energization of the associated power means unless that door is closed, and operable when the door is closed to cause locking actuation of the associated plurality of deadbolts if the control switchmeans previously has been moved to door-closing position. This assures locking operation of the deadbolts for all closed doors when the control switch means is moved to door-closing position, and subsequent automatic locking operation of the deadbolts for each door remaining open as that door subsequently is closed.

This invention also includes signal means in such a system for indicating at the remote control point the closed and open positions of each door and the active or inactive positions of the deadbolts associated therewith.

IN THE DRAWINGS:

FIG. 1 is an elevational view, with parts omitted, of

a portion of a security system embodying this invention;

FIG. 2 is a horizontal sectional view showing a plural- I ity of swinging doors in such a system, with parts FIGS. 4, 5 and 6 are detailed. horizontal sections taken substantially on the lines 44, 5-5 and 6-6, respectively, of FIG. 3;

FIG. 7 is a series of circuit diagrams illustrating the various positions of the several switch means employed;

FIG. 8 is an elevational view similar to FIG. 3 showing a second modified system employing an electric motor with the upper portion illustrating lock bar actuating means in raised position and the lower portion showing the lock bar and one of the deadbolts in an intermediate position;

FIG. 9 is an elevational view showing a third modification employing solenoid means for lifting the lock bar to locked position; and

FIG. 10 is an elevational view of a fourth modification employing solenoid means for effecting locking and unlocking of the deadbolts.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, a security system illustrated generally by reference numeral 11 is illustrated in part as including a plurality of swinging doors 12 hinge'mounted in the well-known manner in a security structure including vertical sidewalls 13, front walls 14 having apertures adapted to be closed by the doors 12 and provided with vertical covers 15 (FIG. 5) in locking columns 16 forming a part of the front walls 14, and horizontal covers 17 (FIG. 1) providing access to authorized personell to a housing portion disposed above the doors and enclosing portions of the power and switch means.

As also shown in FIG. 1, each door 12 is provided with a suitable knob or other means 18 for manually swinging the same and an institutional lock 19 of wellknown construction having a latchbolt manually retractable by a knob from the inner side and by a key from the outer or corridor side shown in FIG. 1.

As best seen in FIG. 3, each door is pivotally supported at one side by any suitablehinge means 21 mounted in the well-known manner, and in its opposite side or vertical edge with a suitable circular aperture aligned with a bore 22 in a keeper member 23 secured in any suitable manner interiorly of the door to receive the outer end of a deadbolt 24. As shown in broken lines in FIG. 1, two such deadbolts 24 are provided for each of the doors 12 adjacent upper and lower ends of the doors, respectively.

In the preferred form illustrated in FIGS. 1, 5 and 6, each of the two deadbolts 24 for a particular door 12 is shown as secured at its inner end in any suitable manner, as by welding, to a pair of horizontally disposed plates 25 which are similarly secured at their inner portions to the inner end of a guide bolt 26. This guide bolt 26 comprises a functional extension of the deadbolt 24 and these two bolts extend slidably through suitable apertures in complemental brackets 27 secured at their inner ends to a mounting plate 28 which, in turn, is welded or otherwise secured to the inner rearward wall of the locking column 16. As seen best in FIG. 5, the vertical wall of that locking column which forms a portion of the frame for the door 12 is provided with an aperture for slidably receiving the deadbolt 24. In this connection, it will be observed that the outer portion of the bore 22 of the keeper 23 is somewhat enlarged and tapered and the inner end of that bore is open which effectively guides inward movement of the deadbolt 24 and prevents packing of foreign material into the keeper when the door is open which might plug the same or interfere with locking movement of the deadbolt when the door is in its closed position.

Each of the two plates 25 is provided with a slot 29 (FIG. through which a vertical pin 31 extends, the upper and lower ends of that pin extending into suitable apertures in a pair of vertically spaced crank discs 32. The lower crank disc 32 is secured in any suitable manner to the upper end of a lower vertical shaft 33 supported by a bearing bracket 34 which, in turn, is secured to the mounting plate 28. The upper crank disc 32 similarly is secured to the lower end of an upper vertical shaft 35 extending through a bearing bracket 36 which also is secured to the mounting plate 28.

Although not illustrated herein in detail, it will readily be understood that this upper deadbolt structure is duplicated for the lower deadbolt 24 associated with the door 12 of these figures, the lower end of the shaft 33 being associated with that lower deadbolt 24 in the same manner as is the lower end of the upper shaft 35 shown in FIG. 3.

From the above description, it will be evident that rotation of the shafts 33,35 through 180 from their positions of FIGS. 3 and 5 will withdraw the deadbolts 24 from their keepers 23 into inoperative positions by virtue of the crank action of the discs 32, pins 31, slots 29 and plates 25. Such rotation of these deadbolt driving shafts 33,35 is effected by an electric motor 37 which, together with its gear reducing mechanism, is mounted in any suitable manner in the upper power and switch mechanism housing, as by a bracket 38 supported by the upper wall of the door frame, through a suitable aperture 39 (FIG. 3) in which the upper end of the shaft 35 extends. The drive shaft extending downwardly from the motor 37 is connected to a cam and coupling member 41 which also is drivingly secured to the upper end of the shaft 35. As shown in FIGS. 3 and 6, the upper portion of the member 41 is provided with a flat 42 which, together with the adjacent periphery thereof, cooperates with the actuating members of a pair of microswitches 43 and 44, hereinafter referred to as motor position or travel switches, which are secured in any desired manner to thebracket 38.

As shown in FIGv 3, a switch actuating member 45 is secured in a suitable manner to the swinging door 12 coaxially with the door hinge means 21 and extends upwardly through a suitable aperture into the power and switch housing that encloses motor 37 and switches 43,44. The upper end of that actuating member 45 is connected to one end ofa horizontally extending finger 46 carrying an adjustable screw member 47 at its other end to actuate door position safety switch means in the form of microswitch 48, as also shown in FIG. 4.

As is well understood in this art, a control point is established at a position spaced or remote from the swinging doors 12 of the security system 11 from which authorized personnel may render the deadbolts 24 for the several doors operative or inoperative. In FIG. 7 a series of circuit diagrams is illustrated for controlling the power means for actuating the plurality of deadbolts 24. The illustrated circuit is for the motor 37 which comprises the power means of the preferred embodiment hereinbefore described and, in addition to that motor, the position switches 43 and 44 actuated thereby through the agency of the cam member 41, and

the door position safety switch 48 heretofore described are included. Control switch means in the form of a manually operable switch 49 which is located at the remote control point referred to also is included in this circuit which is merely illustrative of the preferred manner in which the instant security system is electrically controlled and actuated.

At the remote control point, signal means are provided for indicating closed and open positions of the several doors 12 and active or inactive positions of the deadbolts 24 associated therewith. In addition to the previously described motor position or travel switches 43 and 44, the door position safety switch 48 and the manually operable control switch 49, this signal means includes a red signal light 51 and a green signal light 52. As shown in FIG. 7, one side of each of these lights 51,52 is connected to one side of a current supply line 53, the other companion current line 54 being connected to the remote control switch 49. The other side of the red light 51 is connected to a conductor 55 engaged by the safety switch 48 when the door associated therewith is open. When the door is closed, that safety switch 48 engage a conductor 56 which is connected to the position switch 43. When the door is closed and locked, that position switch 43 contacts a conductor 57 which is connected to the other side of the green light 52. It also will be noted from FIG. 7 that the remote control switch 49 is adapted to engage either a conductor 58 connected to the safety switch 48 or a conductor 59 connected to the position switch 44.

It will be appreciated that the several sections of FIG. 7 designated A through E show positions of the different switches at different times during use of the instant security system, and that the circuit of each such section includes only the motor 37 for operating the deadbolts of one particular door and the position switches 43,44, safety switch 48, signal lights 51 and 52 for that particular door, with the understanding that the electrically operable power means, switches and signal lights for each other door in the system similarly is interconnected for control by switch 49 at the remote control point. In FIG. 7-E, the door is closed and locked, control switch 49 contacting conductor 58, the door position safety switch 48 contacting conductor 56, and motor position switch 43 contacting conductor 57 to complete the circuit through and energize the green light 52. Anyone at the remote control point thus is apprized of the fact of that particular door being closed and locked by virtue of the lock position of control switch 49 and signal 52 being lighted. The red light 51 is not energized at such time because of the position of the door safety switch 48.

When the person at the remote control point wishes to unlock the deadbolts 24 associated with the several doors, it is necessary only to move the remote control switch 49 to its unlock position which initially will result in the switch and signal means being conditioned as illustrated in FIG. 7-A. This results in the deenergization of the green light 52 because of its circuit being broken at control switch 49. At the same time, a circuit is completed from that switch 49 through conductor 59 and motor position switch 44 through the motor 37. This energizing of motor 37 withdraws the associated deadbolts 24 from their keepers 23 through the agency of the cam and coupling member 41 (FIG. 3), shafts 35 and 33, crank discs 32, pins 31 and deadbolt plates 25. This rotation of cam member 41 removes flat 42 thereon from alignment with the actuator of motor position switch 43 to move the same to its position 7-B and, after the motor has rotated the shafts 33 and 35 through 180 to complete withdrawal of deadbolts 24, the flat 42 on cam member 41 is aligned with the actua' tor for door position switch 44 which allows the same to be moved by its usual actuating spring from engagement with the conductor to the motor 37 and into contact with conductor 55. As shown in FIG. 7-B, this results in energization of the red signal light 51 through conductor 55, switch 44, conductor 59 and control switch 49, and also stops the motor 37. It will be noted that movement of position switch 43 to that position of FIG. 7-B does not complete the circuit through the motor 37 because of the unlock position of control switch 49.

The occupant of the room closed by any particular door 12 then will be able to open that door, retracting the latchbolt of its institutional lock 19 if such lock is mounted on the door. Such opening of the door results in movement of the door position safety switch 48 from its position of FIG. 7-B to that of FIG. 7-C to interconnect conductors 55 and 58. This prevents energization of the associated motor 37 and maintains the red signal light 51 energized even if the remote control switch 49 is moved from unlock to lock position, as will be appreciated from FIG. 7-C.

However, for any of the doors 12 which are or have been moved to closed position to engage their safety switches 48 with the associatedconductors 56 such selective movement of switch 49 to closed lock position will energize motor 37 through conductor 58, switch 48, conductor 56 and position switch 43, as illustrated in FIG. 7-D. It will be appreciated from the latter that such movement of control switch 49 out of contact with conductor 59 will result in deenergization of the associated red light 51. Consequently, it will be indicated at the remote control point by the lock position of switch 49 and both signal lights 51 and 52 being out that particular door associated with those signal lights is not locked by its deadbolts 24. As soon as this circuit condition of FIG. 7-D obtained, however, the associated motor 37 is energized by a circuit therethrough being completed through 'switch 49, conductor 58, switch 48, conductor 56 and switch 4 3. The resulting rotation of shafts 33,35 through 180 will move the associated deadbolts 24 into locking engagement with their keepers 23 in the door. Upon completion of that door locking operation, the cam member 41 will return the associated switch 44 and permit spring return of the companion switch 43 to their positions of FIG. 7-E wherein the motor is deenergized and the green signal light 52 turns on in the manner hereinbefore described.

Thus it will be appreciated that selective movement of the control switch 49 to lock position immediately will result in movement of all of the deadbolts 24 to locking position with respect to each of the doors 12 which are then in the closed position, and that upon any door not in closed position thereafter being closed, automatic locking actuation of the plurality of deadbolts 24 therewith will be effected.

A second modified form of electrically operable power means for actuating the pluralityof deadbolts associated with a swinging door is illustrated in FIG. 8 wherein the same motor 37 previously described is mounted upon a bracket 38a in the upper power and switch mechanism housing and is connected to a cam and coupling member 41a similar in function to the previously described member 41 which cooperates in the same way as noted with motor position switches 43 and 44. The member 41a is provided with an eccentric crank pin 61 pivotally connected with one end of a link 62, the other end of which is pivotally connected in any suitable manner to the upper end of a vertically movable lock bar 63. This lock bar 63 extends downwardly through the associated locking column 16, being guided for vertical movement by slots 64 in the bar cooperating with bolts 65 carried by column 16. Adjacent each deadbolt 24a which is functionally similar to the previously described deadbolts 24 and is mounted for horizontal sliding movement by suitable brackets 66, a bell crank 67 is provided which is pivoted at 68 on one of the brackets 66 and the arms ofwhich have suitable pin and slot connections 69 and 71, respectively, with the bar 63 and the associated deadbolt 24a. It will be appreciated that only one of these deadbolts is shown in FIG. 8 while atleast one additional such deadbolts is similarly mounted therebelow for cooperation with thatdoor 12. In the lower portion of FIG. 8, the lock bar 63 is shown in an intermediate position so that it will beseen that downward movement will complete the unlocking of the deadbolts 24a, whereas upward movement of the lock bar to the position shown in the upper portion of FIG. 8 will move the deadbolts further to the left into locking engagement with the door. It also will be appreciated that the same control circuit of FIG. 7 heretofore described may be employed with this second modified structure of FIG. 8.

A third modified structure is illustrated in FIG. 9 wherein the same vertically movalble lock bar 63 and members 24a and 6471 described with respect to the second modification of FIG. 8 are employed. In this third modification of FIG. 9, however, the electrically operable power means for actuating the plurality of deadbolts comprises a solenoid means including a solenoid 72 mounted in any suitable manner within the upper power and switch mechanism housing and having an armature 73 which is pivotally connected to one end of a lever 74. The lever 74 is pivotally mounted at 75 intermediate its end in any suitable manner and is pivotally connected at its other end by a link 76 to the upper end of the lock bar 63. In this third modification of FIG. 9, the lock bar 63 is provided with a cam notch 77 on one vertical edgefor cooperation with the actuating member of a position switch 78.

It will be understood that this position switch 78 takes the place of position switches 43,44 of FIG. 7 and the solenoid 72 is substituted for the motor 37. Consequently, energization of the solenoid 72 will raise the lock bar 63 to its position of FIG. 9 to move the associated deadbolts 24a into locking engagement with the door and to maintain the same therein. Such upward movement of lock bar 63 will cause: actuation of the position switch 78 by the cam surface provided by the lower end of notch 77 to energize the green signal light 52, as will be understood from the preceding description of FIG. 7, but only if the associated door position safety switch 48 has been moved in response to closing of the door. If the door is not in closed position, it will be understood that the associated switch 48 will prevent such energizing of the solenoid 72. The latter is a so-called constant duty solenoid and upon deenergization thereof in response to movement of the remote control switch 49 to unlock position, gravity will cause the lock bar 63 to fall and move the associated parts to retract the deadbolts 24a to unlock position.

A fourth modified construction is illustrated in FIG. 10 in which the same lock bar 63, deadbolts 24a and parts 64-71 previously described are employed. A solenoid 72a differing from the solenoid 72 by being of socalled intermittent duty has its armature 73 connected to the lock bar 63 by a link 76 and a pivotally mounted lever 74a which is similar to the lever 74 of FIG. 9. It differs therefrom, however, by being provided with a notch 79 in the upper surface of the end connected to solenoid 7 2a which cooperates with the lower nose end of a deadbolt latch lever 81 that is pivotally mounted in any suitable manner adjacent its upper end at 82 and is provided with a spring 83 urging it counterclockwise in FIG. 10 about its pivot. Intermediate its ends, the lever 81 is pivotally interconnected by link 84 to the armature of an unlocking solenoid 85.

With this fourth modification of FIG. 10, energization of the solenoid 72a will lift the lock bar 63 in the same manner as heretofore described with respect to the third modification of FIG. 9. As that lifting movement of the lock bar 63 is completed, the spring 83 will move the deadbolt lever 81 to its position of FIG. 10 to latchingly engage its lower nose end with the notch 79 to prevent clockwise movement of the lever 74a. This will retain the associated deadbolts 24a in door locking position even if the solenoid 72a is deenergized.

A switch 78a having one contact in addition to those of position switch 78 previously described is substituted therefor in the modification of FIG. 10 to effect such deenergization of solenoid 72a upon completion of the upward movement thereby of the lock bar 63, as will readily be understood. When it is desired to unlock the several doors in the security system employing the modification of FIG. 10, the remote control switch 49 will be moved to unlock position which will energize the unlock solenoids 85 to retract their associated deadbolt latch levers 81 against the action of their spring 83 to release the associated lever 74a for clockwise movement in response to gravity-impelled downward movement of the released lock bars 63.

I claim:

1. An institutional security system for use with a plurality of swinging doors, comprising control switch means located at a control point spaced from said doors, and a plurality of deadbolts electrically controlled by said switch means for preventing opening of each of said doors, said switch means being effective of moving deadbolts of a closed door to a locked position and of moving deadbolts of an open door to a locked position after said open door has been closed.

2. In a security system according to claim I, a keyreleased lock mounted on each of said doors, and electrically operable power means for actuating said plurality of deadbolts.

3. In a security system according to claim 2, door position safety switch means controlled by each of said doors to prevent energization of the associated said power means unless said door associated therewith is closed.

4. A security system according to claim 3, wherein operation of a said safety switch means in response to closing of the associated said door will cause automatic locking actuation of said plurality of deadbolts cooperating therewith if said control switch means previously has been moved to closed position.

5. In a security system according to claim 3, signal means for indicating closed and open positions of said doors and active or inactive positions of said deadbolts associated therewith.

6. A security system according to claim 5, wherein each said power means includes an electric motor and said signal means includes position switches actuated by said motor.

7. A security system according to claim 5, wherein each said power means includes a vertically movable lock bar and actuating means for moving the same, and said signal means includes a switch actuated by each said lock bar.

8. A security system according to claim 7, wherein said actuating means comprises solenoid means.

9. A security system according to claim 8, wherein said actuating means comprises a pivotally mounted actuating lever interconnecting said solenoid means and said lock bar for lifting the latter in response to energization of said solenoid means.

10. In a security system according to claim 9, a deadbolt latch lever, spring means for moving said latch lever into active positionto cooperate with said actuating lever to hold said lock bar in raised position, and an unlocking solenoid connected to said latch lever to move the same against the action of said spring means to inactive position to permit lowering of said lock bar. 

1. An institutional security system for use with a plurality of swinging doors, comprising control switch means located at a control point spaced from said doors, and a plurality of deadbolts electrically controlled by said switch means for preventing opening of each of said doors, said switch means being effective of moving deadbolts of a closed door to a locked position and of moving deadbolts of an open door to a locked position after said open door has been closed.
 2. In a security system according to claim 1, a key-released lock mounted on each of said doors, and electrically operable power means for actuating said plurality of deadbolts.
 3. In a security system according to claim 2, door position safety switch means controlled by each of said doors to prevent energization of the associated said power means unless said door associated therewith is closed.
 4. A security system according to claim 3, wherein operation of a said safety switch means in response to closing of the associated said door will cause automatic locking actuation of said plurality of deadbolts cooperating therewith if said control switch means previously has been moved to closed position.
 5. In a security system according to claim 3, signal means for indicating closed and open positions of said doors and active or inactive positions of said deadbolts associated therewith.
 6. A security system according to claim 5, wherein each said power means includes an electric motor and said signal means includes position switches actuated by said motor.
 7. A security system according to claim 5, wherein each said power means includes a vertically movable lock bar and actuating means for moving the same, and said signal means includes a switch actuated by each said lock bar.
 8. A security system according to claim 7, wherein said actuating means comprises solenoid means.
 9. A security system according to claim 8, wherein said actuating means comprises a pivotally mounted actuating lever interconnecting said solenoid means and said lock bar for lifting the latter in response to energization of said solenoid means.
 10. In a security system according to claim 9, a deadbolt latch lever, spring means for moving said latch lever into active position to cooperate with said actuating lever to hold said lock bar in raised position, and an unlocking solenoid connected to said latch lever to move the same against the action of said spring means to inactive position to permit lowering of said lock bar. 